ColorCheck — CVD Accessibility Scanner is a Chrome add-on designed to enhance web accessibility for individuals with color vision deficiencies. This tool scans the current tab to identify color combinations that may pose challenges for the over 350 million people affected by color blindness. Users receive an accessibility score, palette analysis, and a detailed list of flagged elements that fail to meet WCAG contrast standards, all without requiring any setup or extensive technical knowledge.

Ideal for designers and developers, ColorCheck operates seamlessly across various environments, including production sites and localhost. It employs scientifically-validated simulation matrices and contrast formulas to ensure accurate assessments. The add-on prioritizes user privacy by keeping all scans local, with no data sent to external servers. For users seeking advanced features, a Pro subscription is available, providing access to multi-page reports and AI-driven color palette fixes.